Permanent hose coupling



Feb. 14, 1939. A; 1. SCHOLTES 2,147,355

PERMANENT HOSE COUPLING Filed June 29, 1938 Smaentor y Gttornegi Patented Feb. 14, 1939 'UNITED STATES PERMANENT HOSE COUPLING Albert J. Scholtes, Baltimore,V Md.

Application June 29, 1938, Serial No. 216,574

2 Claims.

The present invention relates to hose couplings, and more particularly to a coupling of the permanent type for securing and sealing a coupling member upon the end of a hose.

An object of the present invention is to provide a coupling wherein the coupling member and the hose, a pipe or the like, are deformed complementary to each other so as to provide a permanent interlock for securing the coupling member on the end of the hose and prevent the pulling out of the hose from the coupling member and the sealing of the end of the hose in the coupling member.

Another object of the present invention is to provide a permanent hose coupling of this type wherein the coupling member may be constructed in one piece with its inner and outer portions to receive the end of a hose therebetween, and wherein the inner member of the coupling is deformed and provided with, raised circumferentially angular portions which are embedded within the inner wall of the hose, and wherein the outer part of the coupling has projections or threads which are embedded in the outer surface portion of the hose so that the hose end is compressed and deformed between the coupling members to securely seal and anchor the hose end in the coupling.

Another object of the inventionis to provide a permanent hose coupling embodying the above characteristics and which is provided with helical ribs and opposed threads or projections within the coupling member which may be produced by the tool forming'the'subject matter of my copending application filed of with.

A further object oftheV invention is to provide a coupling member with inner and outer parts, the inner part of which initially is provided with a smooth outer surface to simplify manufacture and which in finished form is expanded and helically beaded to compress the hose and interlock therewith.

With the foregoing and other objects in view, the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

In the drawing, wherein likev Symbols refer to like or corresponding parts throughout the several views:

Figure 1 is a detail longitudinal section taken through a coupling memberVV ready to be applied to the end of a hose.

Figure 2 is a side elevation, partly in section of the hose coupling, showing the hose and the PATENT oFFIcE coupling member intertted and deformed to secure the hose and the coupling member together and with the hose end deformed and sealed in the coupling, and

Figure 3 is a longitudinal central section taken 5 on the line 3 3 of Figure 2 through the improved hose coupling.

Referring now to the drawing, and first to Figure l, the coupling comprises a coupling member which maybe constructed of one piece, or 10 otherwise, having an outer sleeve portion IIl which may be provided with internal threads or other projections Il if desired, and which, as shown, are in the form -of buttress threads having their shoulders directed toward the inner 15 end of the sleeve I0 `and facing an end shoulder I2. IThe outer end of the sleeve I0 is preferably provided with a flaring inner wall I3 to' admit the easy introduction 'of the extremity of the hose I4 and which also provides a rounded bell 20 shape surface protecting the hose against cutting during the handling of the same.

The coupling member is also provided with an -inner part or nipple I5 whichA extends within the sleeve I0 from the inner margin of the shoul- 25 der I2 and provides, with the sleeve I0, an an'- .nular space for the reception of the end of the hose I4. The inner or closed end of the sleeve lll is provided with a connecting portion I6 of suitable construction adapted to receive a 30 nozzle, a complementaryv coupling member or the like. Initially, the nipple I5 is of less diameter than the internal diameter of the shoulder I2 to admit the regis/ ely free passage of the hose 'endl/into* the coupling prior to the deforming 35 ol` the parts for interlocking the hose to the coupling. As shown in Figures 2 and 3, the innerpart or nipple I5, after the hose end has been forced into the sleeve I0 about the nipple I5, is expanded and deformed toeprovi'deanchor-4g` n ing ribs I1 which are embeded in the inner surface portion of the hose I4, and which together with the expansion of the nipple I5, compress and deform the hose end into the projections or threads II of the sleeve I0 so that the hose end is compressed radially and caused to expand axially and thus bind against the shoulder I2 of the coupling member for firmly sealing the extremity of the hose thereagainst.

The raised beads or projections I1 may be of any suitable character and are preferably spaced apart and in intersecting relation to provide peripheral angular projections for eiectively anchoring and holding the hose end in the coupling. This may be accomplished by the construction shown in Figures 2 and 3 wherein the raised beads or projections I1 are in the form of helical ribs provided by corrugating the nipple I5 outwardly at spaced points and in helical ridges suitably spaced apart and extending continuously throughout the nipple I5 from end to end. These helical ridges may be disposed in opposite directions so that they intersect upon the outer surface of the nipple I 5 and provide diamond shaped depressions I8 which receive spaced portions of the inner Wall of the hose I4 for effectively holding the same against axial and rotational strains. There is thus provided a large number of spaced apart diamond shaped depressions I8 which receive portions of the inner wall of the hose I4 'to compress the latter and also to deform the hose in compressed relation into the buttress threads or projections II of the sleeve I0. The sleeve I is given desired thickness and stability to withstand internal pressures incident to the construction or formation of the hose coupling while the nipple II is of such thickness and quality that it may be readily deformed or corrugated to provide the projections II.

The hose end I4 thus provides one member of the permanent hose coupling and is permanently deformed and compressed between the inner and outer parts I and I0 of the coupling member so that the latter is permanently secured to the hose and serves as a means by which the hose may be secured to a nozzle or another hose coupling.

What is claimed is:

1. A hose coupling comprising a coupling member having an outer sleeve with threads in its inner wall and an abutment shoulder at its inner end, a hose end fitting in said sleeve against said shoulder and receiving said threads in its outer surface portion, and an expanded inner part carried by the sleeve and extending from theshoulder thereof in spaced relation to the sleeve and tting within said hose, said inner part having helical raised ridges formed during the expanding process and extending in a direction opposite to that of the threads of the outer sleeve and embedded in the inner wall of the hose for maintaining the same in compressed and deformed relation between the inner and outer parts of the coupling member.

2. A hose coupling, comprising a coupling member having a nipple and a sleeve spaced about the nipple, and a hose end fitted over the nipple in said space between the nipple and sleeve, said nipple having helical ridges on its outer surface formed during the expanding process and embedded in the inner wall portion of the hose end compressing the latter in the sleeve and cooperating therewith to secure the hose end in the coupling member,

ALBERT J. SCHOLTES. 

